Martin Brook is a river in Otsego County, New York. It converges with the Susquehanna River in Unadilla.
| Martin Brook | |
|---|---|
  Location of the mouth of Martin Brook | |
| Location | |
| Country | United States |
| State | New York |
| County | Otsego |
| Physical characteristics | |
| Source | |
| • coordinates | 42°21′41″N 75°19′12″W / 42.3613889°N 75.32°W |
| Mouth | Susquehanna River |
• coordinates | 42°19′23″N 75°18′42″W / 42.3231365°N 75.3115635°W[1] |
• elevation | 981 ft (299 m) |